They are of good quality and they are only $35 - so you could always order one and do some testing.  The support from Parallel Miner is pretty amazing.  Check out the discussions tab - I have worked with Joseph in the past.  He is very responsive and will generally respond via an email or phone call within a few hours of your request.

Here is a video of one of the PSUs in action -

https://www.youtube.com/edit?o=U&video_id=Dq0CyIQWDrk